S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) is a supplementary component build into many modern storage devices through which devices monitor, store, and analyze the health of their operation. Statistics are collected (temperature, number of reallocated sectors, seek errrors...) which software can use to measure the health of a device, predict possible device failure, and provide notifications on unsafe values.

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S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) is a supplementary component build into many modern storage devices through which devices monitor, store, and analyze the health of their operation. Statistics are collected (temperature, number of reallocated sectors, seek errors...) which software can use to measure the health of a device, predict possible device failure, and provide notifications on unsafe values.

== Smartmontools ==

== Smartmontools ==

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The smartmontools package contains two utility programs ({{ic|smartctl}} and {{ic|smartd}}) to analyze and monitor storage devices. Install {{Pkg|smartmontools}} from the official repositories.

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The smartmontools package contains two utility programs ({{ic|smartctl}} and {{ic|smartd}}) to analyze and monitor storage devices. Install {{Pkg|smartmontools}} from the [[Official Repositories|official repositories]].

=== Detect if device has SMART support ===

=== Detect if device has SMART support ===

Line 12:

Line 12:

# smartctl -i /dev/<device>

# smartctl -i /dev/<device>

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(where <device> is {{ic|sda, hda,...}}). This well give general information about the device, the last two lines will show if it is supported:

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(where <device> is {{ic|sda, hda,...}}). This will give general information about the device, the last two lines will show if it is supported:

SMART support is: Available - device has SMART capability.

SMART support is: Available - device has SMART capability.

Line 25:

Line 25:

Three type of health tests that can be performed on the device (all are safe to user data):

Three type of health tests that can be performed on the device (all are safe to user data):

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# Short (the hightest-probability tests of detecting device problems)

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# Short (runs tests that have a high probability of detecting device problems)

# Conveyance (identifies if damage incurred during trasportation of the device)

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# Conveyance (identifies if damage incurred during transportation of the device)

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To view the device's available tests and the it takes to perform the tests do:

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To view the device's available tests and the time it will take to perform each test do:

# smartctl -c /dev/<device>

# smartctl -c /dev/<device>

Line 35:

Line 35:

To run the tests do:

To run the tests do:

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# smartctl -t short /dev/<device>

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# smartctl -t short /dev/<device>

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# smartctl -t long /dev/<device>

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# smartctl -t long /dev/<device>

# smartctl -t conveyance /dev/<device>

# smartctl -t conveyance /dev/<device>

==== Results ====

==== Results ====

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To get overall health status (gathered from various tests) do:

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To view the test's overall health status (compiled from all tests):

# smartctl -H /dev/<device>

# smartctl -H /dev/<device>

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To view the test result errors:

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To view the test's result errors:

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# smartctl -l error /dev/<device>

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# smartctl -l selftest /dev/<device>

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To view detailed test results:

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To view the test's detailed results:

# smartctl -a /dev/<device>

# smartctl -a /dev/<device>

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If no errors are reported the device is likely healthy. If there are a few errors this may or may not indicate a problem and should be investigated further. When a device starts to fail it is recommended to backup the device and replace it.

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If no errors are reported the device is likely healthy. If there are a few errors this may or may not indicate a problem and should be investigated further. When a device starts to fail it is recommended to backup the data and replace it.

=== Monitor devices ===

=== Monitor devices ===

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Device(s) can be monitored in the background with use of the smartmontools daemon that will check device(s) and optionally email any potential problems. To have devices monitored on boot, add {{ic|smartd}} to the daemons array of {{ic|rc.conf}}.

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Devices can be monitored in the background with use of the smartmontools daemon that will check devices periodically and optionally email any potential problems. To have devices monitored on boot, enable smartd service:

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systemctl enable smartd.service

The smart daemon can be edited for more exact configuration in {{ic|/etc/smartd.conf}} (the configuration is well commented) otherwise all tests are run on all devices. Or, each device can be specified and all tests run by doing (uuid's and device ID can be used for more exact matching):

The smart daemon can be edited for more exact configuration in {{ic|/etc/smartd.conf}} (the configuration is well commented) otherwise all tests are run on all devices. Or, each device can be specified and all tests run by doing (uuid's and device ID can be used for more exact matching):

Line 75:

Line 77:

DEVICESCAN -m address@domain.com

DEVICESCAN -m address@domain.com

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To be able send the email externally (i.e. not to the root mail account) a MTA (Mail Transport Agent) or a MUA (Mail User Agent) will need to be installed and configured. Common MTAs are [[msmtp|MSMTP]] and [[SSMTP]]) and MTUs are sendmail and [[Postfix|Postfix Local Mail]].

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To be able to send the email externally (i.e. not to the root mail account) a MTA (Mail Transport Agent) or a MUA (Mail User Agent) will need to be installed and configured. Common MTAs are [[msmtp|MSMTP]] and [[SSMTP]]. Common MTUs are sendmail and [[Postfix]].

Once the mail agent is setup the {{ic|-M test}} option can be used to test if an email will be sent (restart the daemon immediately to discover):

Once the mail agent is setup the {{ic|-M test}} option can be used to test if an email will be sent (restart the daemon immediately to discover):

DEVICESCAN -m address@domain.com -M test

DEVICESCAN -m address@domain.com -M test

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==== Power management ====

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If you use a computer under control of power management, you should instruct smartd how to handle disks in low power mode. Usually, in response to SMART commands issued by smartd, the disk platters are spun up. So if this option is not used, then a disk which is in a low-power mode may be spun up and put into a higher-power mode when it is periodically polled by smartd.

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DEVICESCAN -n standby,15,q

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More info on [http://sourceforge.net/apps/trac/smartmontools/wiki/Powermode smartmontools wiki].

Revision as of 04:13, 28 April 2013

S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) is a supplementary component build into many modern storage devices through which devices monitor, store, and analyze the health of their operation. Statistics are collected (temperature, number of reallocated sectors, seek errors...) which software can use to measure the health of a device, predict possible device failure, and provide notifications on unsafe values.

If no errors are reported the device is likely healthy. If there are a few errors this may or may not indicate a problem and should be investigated further. When a device starts to fail it is recommended to backup the data and replace it.

Monitor devices

Devices can be monitored in the background with use of the smartmontools daemon that will check devices periodically and optionally email any potential problems. To have devices monitored on boot, enable smartd service:

systemctl enable smartd.service

The smart daemon can be edited for more exact configuration in /etc/smartd.conf (the configuration is well commented) otherwise all tests are run on all devices. Or, each device can be specified and all tests run by doing (uuid's and device ID can be used for more exact matching):

#DEVICESCAN
/dev/<device> -a

Other options include:

-n standby,q to run diagnostics only when device is spun-up.

Details about smartd operations can be found in: /var/log/daemon.log.

Email potential problems

To have an email sent when a failure or new error occurs, use the -m option:

DEVICESCAN -m address@domain.com

To be able to send the email externally (i.e. not to the root mail account) a MTA (Mail Transport Agent) or a MUA (Mail User Agent) will need to be installed and configured. Common MTAs are MSMTP and SSMTP. Common MTUs are sendmail and Postfix.

Once the mail agent is setup the -M test option can be used to test if an email will be sent (restart the daemon immediately to discover):

DEVICESCAN -m address@domain.com -M test

Power management

If you use a computer under control of power management, you should instruct smartd how to handle disks in low power mode. Usually, in response to SMART commands issued by smartd, the disk platters are spun up. So if this option is not used, then a disk which is in a low-power mode may be spun up and put into a higher-power mode when it is periodically polled by smartd.